# Relationship history for MSHA mine 1518294

Current hierarchy: **J Lee  Powell → Mid-South Construction, Inc. → O'BRYAN MINE**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** J Lee  Powell et al → O'BRYAN MINE; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mid-South Construction, Inc. → O'BRYAN MINE; 2000-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Lee  Powell et al → Mid-South Construction, Inc.; 2000-10-01 to current/open; source msha-controller-operator-history